Improvement in sawing machines



, @MMU tutes gstwt @ffice I. M. MRSTN AND H. R. HULING, OFA'IROXBURY,LASSCHUSETTS.

l Lettere Patent No. 61,079, dated.' January 8, 1867.

IMPROVEMENT 1N siwnve moslims.

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TO ALL WHOM IT MAY CONCERN: l v

Be it' known that we, l. M. MgRS'rON and H. R. HULING, of Roxbury, inthe county of Norfolk, and

State of' Massschuset-te'have invented a new and useful Improvement i'nHand-Sewing Machine; and we do hereby declare that the following is s.full, clear, and exact description thereof, which will enable othersskilled in the art to make and use the same, reference being had to theaccompanying drawings, forming a part of this specification, in whichlFigure-1 is a side view of oul` improved sawing machine.

'Figure `2 is a vertical cross-sectionl of the same, taken through theline a: :c,'iig. 1.

Figure 3 is a vertical longitudinal section of the same, taken throughthe line y y, fig.' 2. I Figure is a detail viewof a portion of the sideof the machine, showing the larger gear-wheel replaced with a smallerone. y

Similar letters of `reference indicate like parts.. Our invention has.for its object to furnish an improved hand-sawingl machine, by means ofwhich sawing may be donc casier, better, faster, and consequentlycheaper than by other machines; and it consists, first in thecombination and arrangement of the curved and slotted support for thespindle ofthe exc'hanegahle'gearwheels with the lower feedroller, withthe screw and with the frame of the machine; and second, in the-combination and arrangement of the springs with the upper feed-roller,withfthe rods, and with the frame of the machine, as hereinaftermqrefully described. A l

A is the drawing-shaft,'which revolves in bearings in the frame B of themachine. To oneend `of this shaft is attached the crank C, by means ofwhich tho machine is driven. To the other end of the shaft A is attachedthe fly-wheel D, which should be of suicient size and weight to impartthe proper amount of momentum to the machine. To the shaft A, betweenthe Aily-wheel D and the side of the frame B ofthe machine, is attacheda cog-wheel, E, which meshesinto a smaller cog-wheel, F, (shown indotted lines in iig. 3,) attached to thesawshaft G. The saw-shaftGrevolvcs in bearings in the frame'B, and carries the lsaw H upon itsinner end. By

I thisvarrangement of the gear-wheels E and F in connection with theshafts A and G, an increased velocity and reversed motion are given tothe saw, which enables it to make an easier and smoother cut. To thedriving-shaft A, between the crank C and the side of the frame B of themachine, is attached a cog-wheel I. K is a support, to which the spindleA is attached, upon which the cog-wheels Band C', or the cog-wheel J,revolve. One end of the support K is pivoted to the lower feed-roller'M,the end of l which passes through a hole formed in the said end of thesaid support K. The other end o'f the support K is slotted, as shown iniigs. 1 and 4, through.V

which slot passes the projecting en'd of the screw E', attached to theside of the frame B, uponvthe end of which screws the thumb-nut D', bymoans of which the said support K is securely held in any desiredposition. The.

support yK is curved in the form shown4 in figs. 1 and 4, so that, asthe supp'ortK is moved back and forth along the screw E', the distancebetween the spindle A and the cog-wheel may'be varied,while thedistancebetween the spindle A. and the cog-wheel L remains constant. Thisallowsdiercnt-siz ed gear-wheels to be placed upon.

the spindle A', so as to regulate the feed of the machine at pleasure. Bis a gear-wheel, vfitting and working upon the-spindleA, and theteeth ofwhich mesh into the teeth of the gear-wheelI, as shown in fig. 1. To theinner side of the Vgear-wheel B is securely attached 'the smallgear-wheel C', which is of such a size that its teeth may mesh into thegear-wheel L, attached to the edge of the lower feed-shaft M. When it isdesired that y the feed of the machine should operate slower, thegear-wheels B and C may be replaced by the gear-wheel J,

and the support K so shifted as to bring` the teeth of the saidgear-wheel inv contact with the teeth of the gearwheel I. The cog-wheelJ is made so long that both the wheels I and L may mesh into it, asshown in fig. 2. The cog-wheel L is attached to and revolvesY the lowerfeed-roller This roller revolves in bearings in the frame B of themachine, and is furnished with projecting spurs, N, to insure its actionupon the timber being fed to the saw. The upper veecl-roller'O revolvesin bearings formed in the ends. of the two steel springs 4l? R, asshownl in the drawings. The other ends of these springs, P R, areattached to the frame B of the machine, and they are held in the properposition to impart the requisite pressure to the timber, being fedforward to the saw by the rods S and thumb-nuts F. This arrangementallows the springs l? and R to give, both in fro'nt and rear of the saidrods, S, and insures a steady and uniform pressure upon the timber whilebeiiiiilfed forward to the saw. '.L is the guide, along which the edgeof 'the timber to be sewn is fed,so as to insure the strips being alwaysof the same breadth. This guide-is held in place by set-screws, U and V,passing up through the table b of the machine, and it is made adjustablebysaid set-screws passing up through slots X formed'in said table b asshown in iig. 3.

Having thus describedour-invention, we claim as new, and desire tosecure by Letters Patent- The slotted curved support K attached to thelower feed-roller M and screw E, for the purpose of allowingdiierent-sized gearJ-Yhecls to be plced uponfthe 'spindle A of thesupport K, s'o as to regulate the feed of the machine, when all areconstructed 'end arranged es herein shown and described. l

' I. M. MARSTON,

\ l H. R. HULING. Witnessesz GILEs H. RICH, Twins.. C. CRAFT.

